Functions and calling functions

Projects Programming
1

I'm new to arduino programming and tried lots of things to make this work but I dont know how to program functions using arduino for a project.
Code posted below.
Thanks in advance.

#define forward
int fO;
#define left
int lE;
#define right
int rI;
#define reverse
int rE;


void forward(){
  digitalWrite(7, HIGH);
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
}

void left(){
  digitalWrite(7, HIGH);
  digitalWrite(8, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
}

void right(){
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
}

void reverse(){
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
}

void setup() {
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
 // one output pin for each of the motors 
 // 7 and 8 are the left and 9 10 are the right
  
}

void loop() {
  forward();
  digitalWrite(7, HIGH);
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
  delay(1000);
  left();
    digitalWrite(7, HIGH);
  digitalWrite(8, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
  delay(1000);
  right();
    digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
  delay(1000);
  reverse();
   digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
  delay(1000);

}
2

Hi,
you wrote and called the functions correctly;
I just made some corrections and removed what was redundant.
See if this is how you want your code to work.


void forward(){
  digitalWrite(7, HIGH);
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
}

void left(){
  digitalWrite(7, HIGH);
  digitalWrite(8, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
}

void right(){
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
}

void reverse(){
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
}

void setup() {
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
 // one output pin for each of the motors 
 // 7 and 8 are the left and 9 10 are the right
}

void loop() {
  forward();
  delay(1000);
  left();
  delay(1000);
  right();
  delay(1000);
  reverse();
  delay(1000);
}
3

Welcome to the forum

What is the purpose of the #defines and the variable declarations at the start of the sketch ?

5

thanks alot man a huge help and works great! :))

6

Hi,
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7

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